The first is the Urn Tomb, with its open terrace built over a double layer of vaults and only accessed through large wide steps built on top of many vaulted rooms organized on two floors which are believed to be a church in Byzantine times. The main chamber measures 20 by 18 meters and the patterns in the rock are striking; the tomb must originally have served more as a funerary chapel or triclinium than as a tomb. Its enormous height and deep courtyard gives it an air of stately importance which is enhanced by its elevated position.